Bump postcss from 8.4.24 to 8.4.29 in /public (#259)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.24 to 8.4.29.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.24...8.4.29)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

public/package.json

@@ -51,7 +51,7 @@
     "eslint-plugin-react": "7.32.2",
     "jest": "29.5.0",
     "lerna": "7.1.4",
-    "postcss": "8.4.24",
+    "postcss": "8.4.29",
     "prettier": "^2.8.4",
     "ts-jest": "29.1.1",
     "ts-node": "10.9.1",